I don't use Vista, so I can't help you much there. You can try increasing the microphone's volume and see if that works or not.
As for other games that uses the mic function immediately, I can only think of one of the minigames in Final Fantasy Fables Chocobo Tales that uses the mic function. There might be other games, but that's all I can think of right now.
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How do I use an emulator?
